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Showing papers on "Testbed published in 1979"


28 Sep 1979
TL;DR: A Contention Based, Priority Oriented, Demand Access (CPODA) protocol has been proposed for use in a network of shipboard computers and terminals designed to provide access to the Advanced Command and Control Architectural Testbed via ARPANET.
Abstract: : A Contention Based, Priority Oriented, Demand Access (CPODA) protocol has been proposed for use in a network of shipboard computers and terminals designed to provide access to the Advanced Command and Control Architectural Testbed (ACCAT) via ARPANET. A model of the protocol was implemented on NRL's Satellite Communication Simulator and performance studies were conducted. Although delays in the network are likely to exceed levels tolerable in a shore-based communications network for interactive computer use, they may be acceptable for the purposes of the project. (Author)

3 citations


Journal ArticleDOI
TL;DR: CHIMPNET is a testbed system; it is an inexpensive flexible interconnection of microprocessors to support experiments with distributed systems, including studies of distributed database management systems using various interconnection topologies and access protocols.

2 citations



Journal ArticleDOI
13 Aug 1979
TL;DR: The use of this simulation technique has resulted in an extremely flexible testbed for the development of distributed radar tracking system models, and the testbed itself can be quickly tailored to other application problems.
Abstract: A distributed system of cooperating minicomputers is simulated by AIMER (Automatic Integration of Multiple Element Radars) to model and analyze the behavior of a radar tracking system. Simulation is applied in the AIMER project in an attempt to model a network of minicomputers to discover a maximally flexible network architecture. Because building the tracking system out of real hardware would not result in a flexible enough testbed system, the proposed configuration is represented by a software emulation. The instruction sets of the individual processors are emulated in order to allow separation of the measurement facilities from the execution of the system. The emulation is supported by a Nano-data QM-1 micro and nano-programmable host. Extensive performance monitoring hooks have been built into the emulation system which allow small performance perturbations to become visible.The tracking network is controlled by a combination firmware operating system and a special emulated virtual control machine. The tracking algorithms run on virtual machines whose instruction sets and computational throughput can be parameterized when the model is generated, or dynamically by an operator during a run.The radar and ground truth environments for the tracking system are simulated with logic resident in one of the emulated machines, allowing these functions to be monitored as accurately as the tracking algorithms.The use of this simulation technique has resulted in an extremely flexible testbed for the development of distributed radar tracking system models. The testbed itself can be quickly tailored to other application problems.

1 citations


Journal ArticleDOI
18 Nov 1979
TL;DR: This paper presents a solution to the problem of an inadequate microprogram testbed facility for the Prime 400 system, and defines typical problems resulting from lack of good microprogram developement software in the university environment, and provides a model for their solution.
Abstract: This paper presents a solution to the problem of an inadequate microprogram testbed facility for the Prime 400 system, but more importantly, defines typical problems resulting from lack of good microprogram developement software in the university environment, and provides a model for their solution.